• Assign a number as the bridge priority or designate it as the primary or secondary root.PROTOCOL SPANNING TREE RSTP modebridge-priority priority-value• priority-value The range is from 0 to 65535. The lower the number assigned, the more likely this bridge becomes the rootbridge.The default is 32768. Entries must be multiples of 4096.Example of the bridge-priority CommandA console message appears when a new root bridge has been assigned. The following example example shows the console message afterthe bridge-priority command is used to make R2 the root bridge (shown in bold).Dell(conf-rstp)#bridge-priority 409604:27:59: %RPM0-P:RP2 %SPANMGR-5-STP_ROOT_CHANGE: RSTP root changed. My Bridge ID:4096:0001.e80b.88bd Old Root: 32768:0001.e801.cbb4 New Root: 4096:0001.e80b.88bdConfiguring an EdgePortThe EdgePort feature enables interfaces to begin forwarding traffic approximately 30 seconds sooner.In this mode an interface forwards frames by default until it receives a BPDU that indicates that it should behave otherwise; it does not gothrough the Learning and Listening states. The bpduguard shutdown-on-violation option causes the interface hardware to beshut down when it receives a BPDU. When only bpduguard is implemented, although the interface is placed in an Error Disabled statewhen receiving the BPDU, the physical interface remains up and spanning-tree drops packets in the hardware after a BPDU violation.BPDUs are dropped in the software after receiving the BPDU violation. This feature is the same as PortFast mode in Spanning Tree.CAUTION: Configure EdgePort only on links connecting to an end station. If you enable EdgePort on an interface connected to anetwork, it can cause loops.Dell Networking OS Behavior: Regarding bpduguard shutdown-on-violation behavior:• If the interface to be shut down is a port channel, all the member ports are disabled in the hardware.• When you add a physical port to a port channel already in the Error Disable state, the new member port is also disabled in the hardware.• When you remove a physical port from a port channel in the Error Disable state, the error disabled state is cleared on this physical port(the physical port is enabled in the hardware).• You can clear the Error Disabled state with any of the following methods:• Perform an shutdown command on the interface.• Disable the shutdown-on-violation command on the interface (the no spanning-tree stp-id portfast[bpduguard | [shutdown-on-violation]] command).• Disable spanning tree on the interface (the no spanning-tree command in INTERFACE mode).• Disable global spanning tree (the no spanning-tree command in CONFIGURATION mode).To enable EdgePort on an interface, use the following command.• Enable EdgePort on an interface.INTERFACE modespanning-tree rstp edge-port [bpduguard | shutdown-on-violation]Example of Verifying an EdgePort is Enabled on an InterfaceTo verify that EdgePort is enabled on a port, use the show spanning-tree rstp command from EXEC privilege mode or the showconfig command from INTERFACE mode.NOTE: Dell Networking recommends using the show config command from INTERFACE mode.In the following example, the bold line indicates that the interface is in EdgePort mode.Dell(conf-if-te-2/1)#show config!Rapid Spanning Tree Protocol (RSTP) 789
